Directions

In a large bowl, combine the bread, milk, salt, pepper, cumin, coriander, chili powder, smoked paprika, garlic, and Worcestershire sauce. Using a fork, mash into a paste.Add the ground beef, jalapeno, scallions, and cheese. Using your hands, mix until well combined. Shape the beef mixture into 8 patties slightly wider than the diameter of the buns. Form a slight depression in the center of each patty to prevent the burgers from puffing up on the grill. Refrigerate until ready to cook.Preheat the grill to medium-high heat and oil the grates. Brush the cut sides of the buns lightly with oil and set aside.Grill the burgers, covered, until nicely browned on the first side, about 3 minutes. Flip burgers and add cheese (if desired); continue cooking for about 2 minutes more for medium rare. Remove the patties from the grill and let rest on a plate. Add the buns to the grill, oiled side down, and grill for about 1 minute, or until lightly toasted with grill marks. Remove from the grill. Mound the arugula (if using) on the bottom halves of the buns. Top each bottom half with a patty, followed by a generous amount of the Roasted Tomato Peach Jam (or ketchup or salsa) and the upper half of the bun. Serve hot.